Display screen with a transitional graphical user interface



FIG. 1 is the first image in a sequence for a display screen with transitional graphical user interface showing the new design;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is the fifth image thereof; and,

FIG. 6 is the sixth image thereof.

The broken-line rectangle illustrates the perimeter of a display screen. The remaining broken lines illustrate portions of the transitional graphical user interface. The broken lines form no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-6. The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen with a transitional graphical user interface, as shown and described. 